This type of evil laugh sound is widely used online as a general reaction effect rather than being tied to one clearly documented source. Short cackles like this spread through meme edits, prank videos and soundboards because they instantly signal mischief, sarcasm or cartoon villain energy. Creators keep using them because the joke lands fast: one laugh can turn a normal clip into a dramatic reveal, a petty victory or a knowingly over-the-top bad-guy moment.